Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c29194d9567cf4…

MALICIOUS

PDF

33.9 KB Created: 2020-08-16 19:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 013e8bbf065f4c6211b88a5514aa16b8 SHA-1: 39dd506ed6f2a84e1c37f9495319cab9594c9bc5 SHA-256: 40c29194d9567cf410f578b08bd2130684024c7198c049a1d8be4e3c01e44b5d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a prominent link that directs to a malicious redirector, ttraff.com. This heuristic, combined with the ML classifier's high confidence score, indicates a malicious intent. The document body, though obfuscated, contains the same malicious URL and other URLs that appear to be part of a link farm, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=my+reflection+mulan+piano+sheet+music
    • http://xamobod.mymodernsolutions.ca/uploads/1/3/1/1/131164239/4197492.pdf
    • http://gikedoj.beckmancheer.com/uploads/1/3/0/7/130776021/1a71c52ba.pdf
    • http://files.cascadiancouriers.com/uploads/1/3/2/7/132740275/kuzerapumamixifete.pdf
    • http://files.centraleuropeanstringquartet.com/uploads/1/3/2/3/132302888/5842109.pdf
    • http://files.justinshatwell.com/uploads/1/3/1/6/131607163/mukev-mijuripob.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/zebalajefefuvagiwuva.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6238/files/18019680758.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3635/files/blender_video_editing_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/60583171235.pdf
    • https://cdn.shopify.com/s/files/1/0445/4989/8399/files/francesco_petrarca_cancionero.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/vifabebabukusipumi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48466687054.pdf
    • https://cdn.shopify.com/s/files/1/0437/7021/6597/files/debabufagu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1822/1730/files/xulenumu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8947/7273/files/average_worksheets_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0441/2240/7064/files/79829219510.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/podufa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047e6.bin
41091694a2ebe8f5a3ebdf8ae741dcdb03142b78a50dd373ebd0f1722a44a7d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47E6 5364 bytes
font_01_sfnt_off000059fe.bin
fccf372a7525fbd972a70a53532ed48ac1255db058e645974b7a75ed033469ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59FE 9572 bytes

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